import {mapGetters} from 'vuex'
export default{
  computed:{
    ...mapGetters('m_cart',['total'])
  },
  watch:{
    total(){
      this.setBadge()
    }
  },
  onShow() {
    this.setBadge()
  },
  methods: {
      setBadge() {
        uni.setTabBarBadge({
          index:2,
          text:this.total + ''
        })
        if(this.total === 0) {
          uni.removeTabBarBadge({
            index:2
          })
        }
      }
    }
}